Two-parametric model-independent observables for $Z'$ searching at the Tevatron

TL;DR

This paper introduces model-independent two- and one-parametric observables for $Z'$ boson searches at the Tevatron, enabling constraints on its couplings in a general framework, including leptophobic scenarios.

Contribution

It proposes novel, model-independent observables based on integrated Drell-Yan cross sections for $Z'$ searches, accommodating non-universal fermion couplings and leptophobic cases.

Findings

Defined two-parametric observables for $Z'$ coupling constraints.

Proposed a one-parametric observable for leptophobic $Z'$ detection.

Applicable to general $Z'$ models with non-universal fermion interactions.

Abstract

We propose a scheme of searches for the $Z'$ gauge boson as a virtual state in scattering processes at the Tevatron taking into account model-independent relations between the $Z'$ couplings to fermions. We integrate the Drell-Yan process cross setion to construct two-parametric observables, which are suitable for $Z'$ searches in the $p\bar{p} \to l^+ l^-$ process. The observables allow to constrain the $Z'$ vector and axial-vector couplings to SM fermions in a general parameterization with non-universal $Z'$ interactions with fermion generations. Also a one-parametric observable for searching for the popular leptophobic $Z'$ boson is proposed.